Alois zixxe



Patented June 1, 1926.

UNITED STATES.

PATENT OFFICE.

ALOIB am, GRAZ, AUSTRIA, ASSIGNOB, BY MEBNE ASSIGNMENTS, '10 FHLIOB BENSA, OF GENOVA. ITALY.

PROCESS I'OB. MANUFACTURING AMINO PEBYLENE QUINONIB.

No Drawing. Application flledfi'une 15, 1928, Serial 110.. 645,704, and in Austria April 'l, 1923.

It has been discovered that a group of substances hitherto unknown namel the amino perylene quinones is capable 0 dyeing cotton in very dark colours thus forming as contradistinguished from'amino anthraquinones, very useful vat dyes. According to this invention the amino perylene quinones are obtained by the reduction of the corresponding nitro derivatives.

Examples.

To a suspension of one part by weight monoor dinitroperylene quinone in 50 parts by weight of a 5% a ueous caustic soda solution sodium bisulp ite is added while the solution is being heated and agitated until the nitro compound is dissolved. In case of dinitroperylene-quinone a deep violet solution (vat) is thereby obtained.

After ten minutes heating a strong current of air is blown throu h the hot liquid which causes the liquid to be decolorized and the amino compound is precipitated in-the form of a dark powder.

ble in glacial acetic acid, benzol, alcohol,

' violet with a brown tinge The diamino perylene quinone is insolu-.

ether, but soluble in aniline and when heated assumes a, violet colour. For purifying it, the compound is crystallized from aniline causing it to be obtained in dark needles having a, metallic lustre. In concentrated sulphuric acid it gives a red solution. The vat is blue violet, cotton is dyed violet.

By substituting in the example just described for the dinitro perylene quinone bromo dinitroperylene quinone, bromo diamino perylene quinone is obtained in the form of a dark precipitate which is insoluble in the solvents having a comparatively low boiling temperature, but is soluble in boiling aniline and nitrobenzol; From nitrobenzol it crystallizes in fine dark needles soluble in concentrated sulphuric acid with a cherry red colour. The vat is violet, cotton is dyed 5 Claim:

As a new article of manufacture ammo perylene quinones.

In testimony whereof I have signed my name to this specification.

ALOIS ZINKE.

Patented June 1, 1926,

UNITED STATES PATENT orncs.

ALOIS znwn, GM, AUSTRIA, ASSIGNOB, BY MEBNE ASSIGNMENTS, TO IELIOI IBENSA, 0F GENOVA. ITALY.

PROCESS FOR MANUFACTURING AMINO PERYLINE eumom llo Drawing. Application flied June 15, 1928, Serial 110.. 645,704, and in Austria April 7, me.

It has been discovered that a group of substances hitherto unknown name] the amino perylene quinones is capable 0 dyeing cotton in very dark colours thus forming as contradistinguished fromamino anthraqui nones, very useful vat dyes. According to this invention the amino perylene quinones are obtained by the reduction of the corresponding nitro derivatives.

part by weight his in glacial acetic acid, benzol, alcohol,

The diamino perylene quinone is insolu-.

ether, but soluble in aniline and when heated assumes a violet colour. For purifying it, the compound is crystallized from aniline causing it to be obtained in dark needles having a metallic lustre. In concentrated sulphuric acid it gives a red solution. The vet is blue violet, cotton is dyed violet.

By substituting in the example just described for the dinitro perylene quinone bromo dinitroperylene quinone, bromo diamino perylene quinone is obtained in the form of a dark precipitate which is insoluble in the solvents having a comparatively low boiling temperature, but is soluble in boiling aniline and nitrobenzol. From nitrobenzol it crystallizes in fine dark needles soluble in concentrated sulphuric acid with a cherry red colour. The vat is violet, cotton is dyed violet with'a brown tinge ALOIS ZINKE.

Certificate of Correction. It is hereby certified that in Letters Patent No. 1,586,729, granted June 1, 1926,

n the application of Alois Zinke,.of Graz, Austria yd-messes for Manufacturing Ammo Perylene Quinones,

for an improvement in an error appears requiring correctiomas follows: In the heading, line 5, date of filing application. in

Austria, for

April ,7, 1923 read June 20, 1922*; and that the said Letterslatent should be read with this correction therein that thesame may conform to the record of the case in the Patent Oflice.

Signedand sealed this 12th day of Octdber, A. D. i926.

r M. J. MOORE, Acting Conwniaayloner of Patents.

Certificate of Correction.

It is hereby certified that in Letters Patent No. 1,586,729, granted June 1, 1926, ufi on the application of Alois Zinke,7of Graz, Austria, for an improvement in rocew for Llanufaeturing Amino Perylene Quinones, an error appears requiring correction"'as follows: In the heading, line 5, date of filing application in Austria, for Apr-i1], 1923 read June 20, 1992; and that the said letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Oflice.

and sealed this 12th day of October, A. D. 1926.

[SE L] M. J. MOORE, Acting Conwnz'ssimwr of Patents. 

